Which factors include international travel, migration of refugees, antibiotic resistance, and the internet?

The correct classification of international travel, migration of refugees, antibiotic resistance, and the internet as global factors is due to their far-reaching and interconnected impact on a worldwide scale.

International travel and migration of refugees exemplify how individuals can move across borders, facilitating the exchange of cultures, ideas, and sometimes pathogens, affecting public health and societal dynamics globally. Antibiotic resistance is a worldwide challenge that arises from the overuse and misuse of antibiotics across different countries, thereby creating a situation where resistant strains of bacteria can spread rapidly beyond local and national boundaries. The internet serves as a platform that connects people across the globe, influencing how information is shared, culture is expressed, and communities interact irrespective of geographical limits.

These aspects are not limited to local or national contexts; instead, they transcend borders, influencing various aspects of life and health around the world, which is why they are categorized as global factors.